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Homework, Extra Credit, and Exam Retake Policy

Homework and Exam Retake Policy

Homework and Extra Credit Policy for 7 th Grade

Latin at Wichita Collegiate School:

1.Point system. Every Quia is worth how many points it is worth. Exams are 250-600 points each. Quia quizzes for homework will probably average 140-150 points per exam.

2.Homework is a learning opportunity. Be sure to review and refer to notes while doing homework.

3.Do not spend more than 20-30 minutes on Latin homework. This needs to be a focused effort of 20-30 minutes. Preferably closer to 20. Most will finish in 10-15.

4.You may do homework as often as you like to get the score you want. Come for tutorial if you are having trouble.

5.If you are late with homeworkyou must come and show me your score on your computer.

6.For every homework assignment you complete to a 100% you will earn 1 point of extra credit on the exam.

a. You must complete every homeworkassignment by the time of the exam to a 70% or better to receive any extra credit for homework.

b. All homework must be complete to a 50% or better to earn extra credit for vocabulary.

7.You may also do vocabulary sheets for extra credit on exams. You earn 1 point of extra credit for every chapter of vocabulary you complete. You must copy on paper the Latin and English terms. Preferably you write all the Latin words, then try to write the English words from memory. Then look up the words you didn’t know, write them down and repeat as often as you like.

8.If we are covering two chapters you must complete an equal number of vocabulary sheets for each chapter.

a.Example 1: if we are covering chapter 3-4: You may copy the vocabulary in equal numbers for chapters 3 and 4. If you complete 3 chapter 3 vocabulary you must complete 3 chapter 4 to receive 6 points of extra credit.

b.Example 2: If we are on chapter 8, you may do as many chapter 8 as you like each for 1 point. If you want to practice previous chapters you must do them in equal numbers. If you do a chapter 1 you must complete 1 vocabulary sheet from each of the other chapters 2-7 before you may do a second one for chapter 1.

c.Bottom line: Current chapter vocabulary lists must be done in equal numbers and previous vocabulary lists must be done in equal numbers.

9.You may also complete the current Chapter(s) vocabulary fill in on Quia. For every vocabulary fill in Quia you complete you earn 1 point of extra credit on the exam.

10. You may also fill out endings sheets when applicable for extra credit. you get one point per sheet but these points only apply to items missed on the endings themselves.

11. Extra credit caps:

a. If you earn a 93%-100% on the exam the most extra credit you may receive is 10 points. (Not percentage points. 10 points equals about 2.5%)

b.If you earn a 86%-92% on the exam the most extra credit you may receive is 20 points (Not percentage points. 10 points equals about 2.5%)

c.If you earn a 76%-85% on the exam the most extra credit you may receive is 30 points. (Not percentage points. 10 points equals about 2.5%)

d.If you earn a 70%-75% on the exam the most extra credit you may receive is 40 points. (Not percentage points. 10 points equals about 2.5%)

e.If you earn a below 70% on the exam the most extra credit you may receive is 50 points. (Not percentage points. 10 points equals about 2.5%)

EXAM RETAKE PROCEDURE AND POLICY:

1.If you earned below an 70% you must retake the exam or it will be a detention.

2.If you earned a 95% or above you may not retake. At this point it becomes about the grade not about learning.

3.If you earned below and 70% you must come to a tutorial and go over the exam so I can explain what you missed and why.

4.Correct the whole exam in one note or other comparable program or on paper.

5.For any sentence you missed more than 90% on, you must copy the sentence in both languages 2 times.

6.For all chapters except 1-4: You must copy the chart as many times as items you missed on the chart on the exam.

7.For all grammatical concept errors, you must write a sentence about why you missed it on a separate piece of paper.

8.You must do the retake by set deadline. You must meet each deadline to do multiple retakes.

9.You will receive the most recent grade.

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Homework Hotline Number

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PHP: rand

int rand ( int $min. int $max )

Here's an interesting note about the inferiority of the rand() function. Try, for example, the following code.

<?php
$r = array( 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0 );
for ( $i = 0 ; $i < 1000000 ; $i ++) <
$n = rand ( 0. 100000 );
if ( $n <= 10 ) <
$r [ $n ]++;
>
>
print_r ( $r );
?>

which produces something similar to the following output (on my windows box, where RAND_MAX is 32768):

Within this range only multiples of 3 are being selected. Also note that values that are filled are always 30 or 31 (no other values! really!)

Now replace rand() with mt_rand() and see the difference.

Much more randomly distributed!

Conclusion: mt_rand() is not just faster, it is a far superior algorithm.

If you are looking for generate a random expression, like password with alphanumeric or any other character, use this function:

<?php
function GeraHash ( $qtd )<
//Under the string $Caracteres you write all the characters you want to be used to randomly generate the code.
$Caracteres = 'ABCDEFGHIJKLMOPQRSTUVXWYZ0123456789' ;
$QuantidadeCaracteres = strlen ( $Caracteres );
$QuantidadeCaracteres --;

$Hash = NULL ;
for( $x = 1 ; $x <= $qtd ; $x ++)<
$Posicao = rand ( 0. $QuantidadeCaracteres );
$Hash .= substr ( $Caracteres. $Posicao. 1 );
>

//Here you specify how many characters the returning string must have
echo GeraHash ( 30 );
?>

Since many people (myself included) come to this page looking for a way to do a random string, I present a way that uses arrays and shuffle() instead of rand(). This also has the effect of not repeating any characters in the value set.

$arr = str_split('ABCDEFGHIJKLMNOP'); // get all the characters into an array
shuffle($arr); // randomize the array
$arr = array_slice($arr, 0, 6); // get the first six (random) characters out
$str = implode('', $arr); // smush them back into a string

Another way to create an array of random numbers where there are no identical numbers.

($n = number of random numbers to return in the array
$min = minimum number
$max = maximum number)

<?php
function uniqueRand ( $n. $min = 0. $max = null )
<
if( $max === null )
$max = getrandmax ();
$array = range ( $min. $max );
$return = array();
$keys = array_rand ( $array. $n );
foreach( $keys as $key )
$return [] = $array [ $key ];
return $return ;
>
?>

A nice function to generate a random string, using any character:

<?php
function generateRandStr ( $length )<
$randstr = "" ;
for( $i = 0 ; $i < $length ; $i ++)<
$randnum = mt_rand ( 0. 61 );
if( $randnum < 10 )<
$randstr .= chr ( $randnum + 48 );
>else if( $randnum < 36 )<
$randstr .= chr ( $randnum + 55 );
>else<
$randstr .= chr ( $randnum + 61 );
>
>
return $randstr ;
>
?>

Simply use:
generateRandStr(10);

Sample output: $%29zon(4f

I also enjoy making one-liners.

Here's a non-regular expression approach. It generates a random 32 character string consisting of, by default, only A-Z, a-z, and 0-9, but you can change the value of $a for other characters. The random string will be in variable $s after this line.

<?php
for ( $s = ''. $i = 0. $z = strlen ( $a = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789' )- 1 ; $i != 32 ; $x = rand ( 0. $z ), $s .= $a < $x >, $i ++);
?>

If you don't want the same character to appear beside itself, use this:

<?php
for ( $i = 0. $z = strlen ( $a = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890' )- 1. $s = $a < rand ( 0. $z )>, $i = 1 ; $i != 32 ; $x = rand ( 0. $z ), $s .= $a < $x >, $s = ( $s < $i > == $s < $i - 1 >. substr ( $s. 0 ,- 1 ). $s ), $i = strlen ( $s ));
?>

For those of you who want both as a function, use this:

<?php
function rand_chars ( $c. $l. $u = FALSE ) <
if (! $u ) for ( $s = ''. $i = 0. $z = strlen ( $c )- 1 ; $i < $l ; $x = rand ( 0. $z ), $s .= $c < $x >, $i ++);
else for ( $i = 0. $z = strlen ( $c )- 1. $s = $c < rand ( 0. $z )>, $i = 1 ; $i != $l ; $x = rand ( 0. $z ), $s .= $c < $x >, $s = ( $s < $i > == $s < $i - 1 >. substr ( $s. 0 ,- 1 ). $s ), $i = strlen ( $s ));
return $s ;
>
?>

string $c is the string of characters to use.
integer $l is how long you want the string to be.
boolean $u is whether or not a character can appear beside itself.

Examples:
rand_chars("ABCEDFG", 10) == GABGFFGCDA
rand_chars("ABCEDFG", 10, TRUE) == CBGFAEDFEC

Random integers with normal distribution,
it's not scientifically approved, but worked for me.

<?php
/*
* @param float $mean, desired average
* @param number $sd, number of items in array
* @param number $min, minimum desired random number
* @param number $max, maximum desired random number
* @return array
*/
function array_distribute ( $mean. $sd. $min. $max )<
$result = array();
$total_mean = intval ( $mean * $sd );
while( $sd > 1 )<
$allowed_max = $total_mean - $sd - $min ;
$allowed_min = intval ( $total_mean / $sd );
$random = mt_rand ( max ( $min. $allowed_min ), min ( $max. $allowed_max ));
$result []= $random ;
$sd --;
$total_mean -= $random ;
>
$result [] = $total_mean ;
return $result ;
>
?>

Generate a random 5 character A-Z0-9 string

<?php
for ( $i = 0 ; $i < 6 ; $i ++) <
$d = rand ( 1. 30 )% 2 ;
echo $d. chr ( rand ( 65. 90 )). chr ( rand ( 48. 57 ));
>
?>

The Windows rand() function is quite a lot worse than merely having a low maximum value. It's an ordinary Linear Congruential Generator, which means you only need three consecutive values to be able to predict its entire future output.

Given the numbers 13050, 4267, 25352, construct the equations
4267 = (13050a+c) % 32768
25352 = (4267a+c) % 32768

Solving for a and c gives

a = 20077
c = 12345

Which means the next number that should be spat out is (25352×20077+12345) % 32768 = 19105 -- which indeed it is.

It's not the small rand_max that breaks the algorithm, it's a weakness in the LCG algorithm itself. It's designed for when you only want a few kinda-random numbers occasionally, not if you want to generate any random-looking data.

emad_ramahi at hotmail dot com:
I've actually noticed that with a large dataset (100k rows), the query dramatically slows down the server and performance is way too bad.

The way I see it, you have to workable solutions:

<?php
//$Table holds the name of the table we're getting the random row from
//$Rows specifies how many rows we need to fetch
function mysql_rand ( $Query. $Rows = 1 ) <
//getting the table name from $query
//what you can do, is replace the $query argument with $table,
//this way to dont have to search for the table's name
$SQL = sprintf ( 'SELECT COUNT(*) FROM %s'. substr ( $query. stripos ( $query. 'from' )+ 5. strpos ( $query. ' ' )));

$Max = mysql_result ( mysql_query ( $SQL ), 0 );
$Random = rand ( 0. $Max );

//If the random number is 99, and the database only has 100 rows
//We'll subtract the random number, so we don't exceed 100, thus preventing a MySQL error message
return $Query. sprintf ( 'LIMIT %d, %d'. ( $Max < $Rows ). 0. (( $Random > $Max - $Rows ). $Max - $Rows. $Random ), $Rows );
>

//Instead of using MySQL's RAND(), we use LIMIT to fetch rows
//E.g. LIMIT 5,9 fetches from row 5, and the subsequent 9
$SQL = mysql_rand ( 'SELECT row FROM table' ); //SELECT row FROM table LIMIT x, y
?>

or SQL:
SELECT * FROM Table T JOIN (SELECT FLOOR(MAX(ID)*RAND()) AS ID FROM Table) AS x ON T.ID >= x.ID LIMIT 1;

Don't forget, it's faster to use bitwise operations when you need a random number that's less than some power of two. For example,

<?php
rand ()& 1 ;
// instead of
rand ( 0. 1 );
// for generating 0 or 1,

rand ()& 3 ;
// instead of
rand ( 0. 3 );
// for generating 0, 1, 2, or 3,

rand ()& 7 ;
// instead of
rand ( 0. 7 )
// for generating 0, 1, 2, 3, 4, 5, 6, or 7,
?>

and so on. All you're doing there is generating a default random number (so PHP doesn't have to parse any arguments) and chopping off the piece that's useful to you (using a bitwise operation which is faster than even basic math).

frank, nick at nerdynick dot com, and kniht
this is now O(n) instead of O(n^2) ish.

<?php
function rand_permute ( $size. $min. $max )
<
$retval = array();
//initialize an array of integers from $min to $max
for( $i = $min ; $i <= $max ; $i ++)
<
$retval [ $i ] = $i ;
>
//start with the the first index ($min).
//randomly swap this number with any other number in the array.
//this way we guarantee all numbers are permuted in the array,
//and we assure no number is used more than once (technically reiterating prev line).
//therefore we don't have to do the random checking each time we put something into the array.
for( $i = $min ; $i < $size ; $i ++)
<
$tmp = $retval [ $i ];
$retval [ $i ] = $retval [ $tmpkey = rand ( $min. $max )];
$retval [ $tmpkey ] = $tmp ;
>
return array_slice ( $retval. 0. $size );
>
?>

<?php
//To Pull 7 Unique Random Values Out Of AlphaNumeric

//removed number 0, capital o, number 1 and small L
//Total: keys = 32, elements = 33
$characters = array(
"A". "B". "C". "D". "E". "F". "G". "H". "J". "K". "L". "M" ,
"N". "P". "Q". "R". "S". "T". "U". "V". "W". "X". "Y". "Z" ,
"1". "2". "3". "4". "5". "6". "7". "8". "9" );

//make an "empty container" or array for our keys
$keys = array();

//first count of $keys is empty so "1", remaining count is 1-6 = total 7 times
while( count ( $keys ) < 7 ) <
//"0" because we use this to FIND ARRAY KEYS which has a 0 value
//"-1" because were only concerned of number of keys which is 32 not 33
//count($characters) = 33
$x = mt_rand ( 0. count ( $characters )- 1 );
if(! in_array ( $x. $keys )) <
$keys [] = $x ;
>
>

foreach( $keys as $key )<
$random_chars .= $characters [ $key ];
>
echo $random_chars ;
?>

Something we discovered in Sydney running BBS Systems before the net advent was here, if we didn't seed of another BBS we would going in circles in our System Physicality Abstraction Layers. The important thing is to seed from a remote system and easy way at the Centroidal Plexus of the web (Chronolabs Cooperative) we offer a seed feed and the following code will randomise you out of the number cycle:

See in PHP both the letters and numbers are seedable as letters are treated as numbers as well. You can always use individual tokens by extracting the Element with DOM. But below is equally effective!

Note that the automatic seeding seems to be done with the current number of seconds which means you can get the same results for several runs on a fast server. Either call srand() yourself with a more frequently changing seed or use mt_rand() which doesn't appear to suffer from the problem.

isn't this just a simpler way of making a random id for somthing? I mean i know that there is a very slight chance that a duplicate could be made but its a very, very, very small chance, nearly impossible.

$rand = mt_rand(0, 32);
$code = md5($rand. time());
echo "$code";

and if you don't want it the md5 can be removed, I've just added it as a prefer it there :)