Teach Health by discussing and modeling good hygiene. Teach Physical Education by hiking, biking, and playing together. Most of us were educated in institutional settings, and that's really all we know. If that's where you are, start there. But gradually allow the Lord to move you toward a less artificial lifestyle of constantly meaningful interaction as you live together according to God's direction.
Some people feel lost without precise curriculum materials.
Needing and using a crutch is no sin. You can spend a lot of money on these and find help through them. There are some wonderful, scripturally-based materials available. I appeal to you not to allow them to dominate your interaction with your children, though. There is seldom a danger of imposing pressure to learn skills above the maturity level of a child in real-life learning situations.