Documenting formative assessment

We have to have at least 10 grades every grading period per subject. It is very difficult to have enough Science grades, because a lot of what we do is more investigating and involves formative assessment. I don't have a lot of summative  grades. It continues to be a challenge to have true assessment of student knowledge. I was very excited to find a rubric today for documenting student performance in Science Process skills. I was also excited to find a Science Journal Rubric that I plan to glue to the front of student Science journals as a guide for student responses. Hopefully these tools will help me next year. I also need to get into a habit of grading journals on a rotating basis because looking through and commenting on class journals also require a lot of time. Any ideas would be welcomed:)