SCIENCE
MATH
http://www.mathplayground.com/mobile_model_algebra/index.html
http://www.mathplayground.com/reflect_and_rotate/index.htm
https://www.ixl.com/math/algebra-1
https://www.ixl.com/math/grade-8
ENGLISH
http://www.englisch-hilfen.de/en/exercises_list/crossword.htm