These are good resources for fun & study.
Science Textbooks on-line Science Books On-line
Sudoku for Kids (daily puzzles with solutions) http://www.dailysudoku.com/sudoku/index.shtml
Math textbook, workbooks, games, manipulatives. Math Text online
Math Facts Practice http://cme.dadeschools.net/mathfacts/mathfacts.html
FCAT Explorer http://www.fcatexplorer.com
Edheads Simple Machines Website http://www.edheads.org/activities/simple-machines/
Practice on geometry includes area and perimeter practice with online interactive or printable worksheets. http://www.teacherplanet.com/resource/area.php
Measurement Inches http://www.funbrain.com/cgi-bin/meas.cgi?A1=s&A2=0&A3=2
Fun online activities for math and science from the BBC. http://www.bbc.co.uk/schools/ks2bitesize/index.shtml
Cool Math for Kids http://www.coolmath4kids.com/times-tables/index.html
Texas released math and reading tests. These are the printable versions if you don't want to take the test online. http://www.tea.state.tx.us/student.assessment/resources/release/taks/index.html
Texas State online tests for math and reading. Scroll down and pick the grade level and either math or reading. At the end of the test click score now. http://www.tea.state.tx.us/student.assessment/resources/release/index.html
Solar System Website - definitions, information, movies, games http://starchild.gsfc.nasa.gov/docs/StarChild/StarChild.html
FCAT Explorer 3rd gr. - extra reading passages for practice (4th grade level) You can do it! http://www.fcatexplorer.com/Parent/4GR/en/parent_tip_list.asp?gs=2
FCAT Math - daily review questions gr. 4 (printable) http://elementarypgms.brevard.k12.fl.us/Grade4Daily.pdf
FCAT tests http://www.nationalgeographic.com/kids/
The earths tilt causes the seasons. Animation. http://www.shsu.edu/~chm_tgc/sounds/flashfiles/earth.swf
The Reason for the seasons - animation. Shows how the tilt of the earth causes the seasons. http://esminfo.prenhall.com/science/geoanimations/animations/01_EarthSun_E2.html
Moon phases animation - really good! http://jove.geol.niu.edu/faculty/stoddard/JAVA/moonphase.html
Animated warm & cold fronts http://www.classzone.com/books/earth_science/terc/content/visualizations/es2002/es2002page01.cfm?chapter_no=visualization
Edheads weather activity http://edheads.org/activities/weather/
Puzzles and Brain teasers http://www.niehs.nih.gov/kids/braint.htm http://www.niehs.nih.gov/kids/braint.htm
Facts & information about Lincoln. Everything you ever wanted to know! Abraham Lincoln
Phases of the moon interactive activity. http://www.wonderville.ca/v1/activities/phases/phases.html
Animation showing seasons caused by the tilt of the Earth. http://www.rkm.com.au/ANIMATIONS/animation-seasons.html
Fun tessellation practice! Tesselate the people. Tessellation Town
Tessellation Information and activities
National Geographic fun activities Science
Battle of the Books - Extra Credit
Battle of the Books - Extra credit questions
Battle of the Books - Oliver Olson quiz