For your math minutes on your reading and math log you could try these sites:

Adding and subtracting fractions:

Challenging fraction sites for those students who are mastering fractions in the classroom (1-4)

1. Mixed and improper fractions
2. Fraction Bar Games
3. Pizza fractions to go
4. Fifth grade fraction work

Helpful fraction and decimal sites.
Use these sites to help your understanding of fractions and decimals.