4th grade Texas TEKS Aligned Task Cards that can be used in work stations, independent practice or for differentiated instruction. Students can use the QR codes to check their own work and assess themselves for mastery of the TEK. They can then use this knowledge in goal setting conferences and to take ownership of their own learning. In addition, 5th and 6th grade teachers can use the task cards to help students fill in gaps in their place value knowledge. Also awesome for STAAR review.