1. **State the problem:** Lester has 12 wooden train tracks, each 1/3 foot long. We need to find the total length of all the tracks connected in a row. 2. **Formula used:** Total length = Number of tracks \( \times \) Length of each track 3. **Apply the values:** $$\text{Total length} = 12 \times \frac{1}{3}$$ 4. **Calculate:** $$12 \times \frac{1}{3} = \frac{12}{3} = 4$$ 5. **Conclusion:** The total length of the 12 tracks connected in a row is 4 feet.